Variable-speed gear.



J. ST-URGESS.

VARIABLE SPEED GEAR.

APPLICATION FILEDJUNE 25,1903.

Patented June 1,1909.

JQHBETS-SHEET 1.

WlTNEEEE-E- lNVENTUR J. STURGESS.

VARIABLE SPEED GEAR. APPLICATION FILED J Unn2s,1903.

2 SHEETS-SHEET 2,.

* 923,212. 7 Patentd June 1,1909.

TaTns Para;

r onnrcn .iOjnN srunen'ss, or rjuo'r, NEW YORK, ASSIGNOR TO s-runenss GOVERNOR nNciNuniuNe To all whom itmay concl rn:

' I lleference 'of which the following is a specification.

COMPANY, or warruwnrirrhNew vomr, A QQRPORAIION or NEV YORK.

VARIABLE-SPEED GEAR.

Specification of Letters Patent.

Patented June 1, 1909.

Application filed June 25, 1903. Serial No. 163,096.

Be it known that 1, JOHN Srunenss, ai citizen of; the United States, residing at Troy, county of Rensselaer, and State of New York, have invented certain new and use ful Improvements in Variable-Speed Gears, i

V The invention relates to such improvements and consists of the novel construc- 1 tionand combination of parts hereinafter maybe had to the accompany 1 ing drawings, and the reference characters shafts power is. transmitted through the is taken through the each other.

my invention. Fig. 2' is a vertical crossone member to another thereof.

fable working diameter.

marked. thereon, which form a part of this specification. Similar characters refer to similar parts in the several figures therein.

Figure 1 of the drawings is a view in front elevation of a variable speed gear embodying sectionof the same taken on the broken line 2-2 in Fig. 1. Fig. 3 is a side view of one, of the rope-supporting segments detached.

Fig. 6 is a similar view illustrating a sliding key-connection between said parts.

The principal object of the invention is to provide a variable speed gear employing a continuousrope for transmitting power from Other objects of the invention will appear in connection with the following description.

Referring to the drawings wherein the invention isshown in preferred form, 2 and 3, are parallel shafts rotatively mounted in bear ngs in the frame, 4,to one of which pulley, 41, and from the other of which power pulley 12.

- Mounted upon j the shafts, 2 and 3, to

forced outwardly rotate therewith are a pair of pulleys of vari- Each of said pulle-ys comprises a pair of segment-supporting members, 10, mounted upon the supporting shaftwith which said members are connected by means of afeather, 11, causing said members. to artake of the rotary movement of said shaft while leaving them free. to be moved longitudinally of the shaft toward and from These segment-supporting members are formed with inclined segment-supporting slideways, 12, convergent toward the supporting shaft, the slideways of one mcm 1 her being located opposite those of the other respectively, each pair of oppositelylocated slideways being adapted to receive and have a sliding wedgewise engagement with the opposite ends of the rope-supporting segments 31. The plurality of segments so 1 supported may be confined, or retained, be

tween said members, 10, in any known man nor, by keys, dovetails, or the like: two forms of such connection being shown in Figs. 5 and 6. p Z

The construction of the segments and their supporting-members is such that as the sup-- porting-members are separated. from each other, the segments are drawn inwardly to reduce the working diameter of the pulley, while as the supporting-members are caused to approach each other the segments are along their slideways to increase the working diameter of the pulley.

The adjustable members, 10, of each pulley are adapted to be moved toward each other upon. their supporting shaft by engagement 1 with the hubs of such members of the respective sleeves, 16, through which their support ing shaft loosely. passes, with which sleeves,

res ectively, operating levers, 17, have slotte pivotal connections at 18.

Each of the levers, 17 is fulcrumed at, 19, upon the frame of the machine, and has its er arm thus connected. with a sleeve, 16, on the shaft, 2, and its lower arm with a like sleeve, 16, on the shaft 3,

I The upper ends of the respective levers, 17, have slotted pivotal connections with the nuts, 20, on the right and left-hand threaded screw-shaft, '21, rotatively mounted in bear? ings in the frame of the machine and adapted to be operated by means of the handwheel 22. direction thus serves nuts, 20, and upper ends causing the segment-supporting members, 10, of the pulley on the shaft, 2, to be moved. toward each otherto increase .the working diameter of said pulley, and at the same time causing the sleeves, 16, on. the shaft, 3,-to be forced away from each other, permitting the disk-supporting members of the pulley on the shaft, 3, to be so arated from each other, and the segments tierebetween forced inwardly toward each other by the pressure exerted by the driving-rope, 33, upon said segments. 11 like manner, 0 eratron of sand screw-sh Operation of said screw-shaft in one to draw together the of the levers, 17,.

ft in the opposite irection causes a movement of separation of the 2, permitting the segment-supporting mem bers on saidshaft to separate under pressure I of the driving rope exerted through the segments, 31, to contract the upper pulley and at the same time positively forces toward each other the segment-supporting members, 10, on the shaft, 3, causing the segments mounted therein to be forced outwardly to expand the lower pulley.

Each of the segments, 31, is provided with parallel grooves, 32, arranged in circumferential lines with like grooves respectively in the other segments, and adapted to receive the respective loopsof a rope-belt, 33, which has a plurality of loops passing around both pulleys,- and one of its loops passing also over guide-pulleys, 34, and around a take-up pulley, 35, supported upon a carriage, 36, movable along track, 37 which carriage is connected by a cable, 38, passing over the guide-pulley, 39, w th thetake-up weight, 40, adapted to ma' tain a uniform tension of the rope under var'ous conditions.

Any known means may be employed for varying the effective working diameter of the respective pulleys. I

hat I claim as new by Letters Patent is 1. In a variable speed gear, and in combiand desire to secure for varying the relative Working diameters of said pulleys ,-"a sin le integral rope-belt ex tending in a plurality of oops around and connecting said grooved ulleys; and an automatic take-up en agea 1e with one of the loops of said r0 e-be t.

2. In a varia le speed gear, and in combination, a pair of shafts; a pulley of variable diameter on one of said s afts having segments each provided with a plurality of parallel grooves arranged in circumferential lines with like grooves respectively in the other segments, and adapted to receive the respective loops of a rope-belt means for ex panding and contracting said pulley; a pulley on the other of'said shafts having corresponding circumferential rooves; a single integral rope-belt having a plurality of loops extending around and connecting said grooved pulleys; and an automatic take-up engageable with one of the loops of said rope-belt.

In testimony whereof, I have hereunto set my hand this 23rd day of June, 1903.

JOHN STURQESS. Witnesses: i

GEO. A. MosHER, E. M. OREILLY. 

